Elements of Group 18 may be called as;1-Noble gases 2-Rare gases 3- Inert gases
The main group elements are groups 1, 2, and 13 - 18.
The number of valence electrons for the elements increases across a period, from 1 (group 1) to 8 (group 18).
group 18 has completely filled electronic configuration and hence are stable. group 1 and group 2 have 1 and 2 electrons respectively in their valence shells and needs to lose these to attain completely filled electronic configuration. hence they are reactive.
Groups on the periodic table are numbered from 1 to 18, with the group number corresponding to the number of valence electrons in the elements of that group. Group 1 elements have 1 valence electron, group 2 elements have 2 valence electrons, and so on. Groups 1, 2, and 13-18 are known as the main group elements.
The oxidation numbers for the first 20 elements in the periodic table are typically as follows: Group 1 elements: +1; Group 2 elements: +2; Group 13 elements: +3; Group 14 elements: +4 or -4; Group 15 elements: -3; Group 16 elements: -2; Group 17 elements: -1; Group 18 elements: 0. Keep in mind that oxidation numbers can vary in different compounds and contexts.
Groups 1, 2, and 13 - 18 are the main group elements, also called the representative elements.
The representative, or main group elements are the elements in groups 1, 2, and 13 - 18.
Group 1 elements are alkali metals. Group-18 elements are inert in nature.
Elements of Group 18 may be called as;1-Noble gases 2-Rare gases 3- Inert gases
The main group elements are groups 1, 2, and 13 - 18.
The number of valence electrons for the elements increases across a period, from 1 (group 1) to 8 (group 18).
The number of valence electrons for the elements increases across a period, from 1 (group 1) to 8 (group 18).
Group 1 elements have an oxidation number of +1, group 2 elements have an oxidation number of +2, group 17 elements have an oxidation number of -1, and group 18 elements (noble gases) have zero oxidation number since they are chemically unreactive.
Elements in groups 1 and 2 of the periodic table are known as the alkali metals and alkaline earth metals, respectively. Elements in groups 13-18 are known as the boron group, carbon group, nitrogen group, oxygen group, halogens, and noble gases.
Representative elements are the elements in groups 1, 2, and 13-18 of the periodic table. These elements are also known as the main group elements and have characteristic properties that make them unique. They are located on the left and right sides of the periodic table.
group 18 has completely filled electronic configuration and hence are stable. group 1 and group 2 have 1 and 2 electrons respectively in their valence shells and needs to lose these to attain completely filled electronic configuration. hence they are reactive.